In the article written by the second-rate author, the age at which Itachi exterminated the entire clan was postponed to 16 years old. Because the second-rate author didn't want Itachi to bear such a heavy fate at the age of graduating from elementary school. I also hope that every Xiaoqiang in Naruto can have a relatively stable teenage period. Therefore, if Itachi annihilates the entire clan, everyone will receive an additional three years.